ieee80211_node.c revision 172211
1/*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2007 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_node.c 172211 2007-09-17 19:07:24Z sam $"); 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/mbuf.h> 33#include <sys/malloc.h> 34#include <sys/kernel.h> 35 36#include <sys/socket.h> 37 38#include <net/if.h> 39#include <net/if_media.h> 40#include <net/ethernet.h> 41 42#include <net80211/ieee80211_var.h> 43 44#include <net/bpf.h> 45 46/* 47 * Association id's are managed with a bit vector. 48 */ 49#define IEEE80211_AID_SET(b, w) \ 50 ((w)[IEEE80211_AID(b) / 32] |= (1 << (IEEE80211_AID(b) % 32))) 51#define IEEE80211_AID_CLR(b, w) \ 52 ((w)[IEEE80211_AID(b) / 32] &= ~(1 << (IEEE80211_AID(b) % 32))) 53#define IEEE80211_AID_ISSET(b, w) \ 54 ((w)[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 55 56#ifdef IEEE80211_DEBUG_REFCNT 57#define REFCNT_LOC "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line 58#else 59#define REFCNT_LOC "%s %p<%s> refcnt %d\n", __func__ 60#endif 61 62static int ieee80211_sta_join1(struct ieee80211_node *); 63 64static struct ieee80211_node *node_alloc(struct ieee80211_node_table *); 65static void node_cleanup(struct ieee80211_node *); 66static void node_free(struct ieee80211_node *); 67static int8_t node_getrssi(const struct ieee80211_node *); 68static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 69 70static void ieee80211_setup_node(struct ieee80211_node_table *, 71 struct ieee80211_node *, const uint8_t *); 72static void _ieee80211_free_node(struct ieee80211_node *); 73 74static void ieee80211_node_table_init(struct ieee80211com *ic, 75 struct ieee80211_node_table *nt, const char *name, 76 int inact, int keymaxix); 77static void ieee80211_node_table_reset(struct ieee80211_node_table *); 78static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 79static void ieee80211_erp_timeout(struct ieee80211com *); 80 81MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 82 83void 84ieee80211_node_attach(struct ieee80211com *ic) 85{ 86 87 ic->ic_node_alloc = node_alloc; 88 ic->ic_node_free = node_free; 89 ic->ic_node_cleanup = node_cleanup; 90 ic->ic_node_getrssi = node_getrssi; 91 ic->ic_node_getsignal = node_getsignal; 92 93 /* default station inactivity timer setings */ 94 ic->ic_inact_init = IEEE80211_INACT_INIT; 95 ic->ic_inact_auth = IEEE80211_INACT_AUTH; 96 ic->ic_inact_run = IEEE80211_INACT_RUN; 97 ic->ic_inact_probe = IEEE80211_INACT_PROBE; 98 99 callout_init(&ic->ic_inact, CALLOUT_MPSAFE); 100 101 /* NB: driver should override */ 102 ic->ic_max_aid = IEEE80211_AID_DEF; 103 104 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 105} 106 107void 108ieee80211_node_lateattach(struct ieee80211com *ic) 109{ 110 struct ieee80211_rsnparms *rsn; 111 112 if (ic->ic_max_aid > IEEE80211_AID_MAX) 113 ic->ic_max_aid = IEEE80211_AID_MAX; 114 MALLOC(ic->ic_aid_bitmap, uint32_t *, 115 howmany(ic->ic_max_aid, 32) * sizeof(uint32_t), 116 M_80211_NODE, M_NOWAIT | M_ZERO); 117 if (ic->ic_aid_bitmap == NULL) { 118 /* XXX no way to recover */ 119 printf("%s: no memory for AID bitmap!\n", __func__); 120 ic->ic_max_aid = 0; 121 } 122 123 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 124 IEEE80211_INACT_INIT, ic->ic_crypto.cs_max_keyix); 125 126 ieee80211_reset_bss(ic); 127 /* 128 * Setup "global settings" in the bss node so that 129 * each new station automatically inherits them. 130 */ 131 rsn = &ic->ic_bss->ni_rsn; 132 /* WEP, TKIP, and AES-CCM are always supported */ 133 rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_WEP; 134 rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_TKIP; 135 rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_CCM; 136 if (ic->ic_caps & IEEE80211_C_AES) 137 rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_OCB; 138 if (ic->ic_caps & IEEE80211_C_CKIP) 139 rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_CKIP; 140 /* 141 * Default unicast cipher to WEP for 802.1x use. If 142 * WPA is enabled the management code will set these 143 * values to reflect. 144 */ 145 rsn->rsn_ucastcipher = IEEE80211_CIPHER_WEP; 146 rsn->rsn_ucastkeylen = 104 / NBBY; 147 /* 148 * WPA says the multicast cipher is the lowest unicast 149 * cipher supported. But we skip WEP which would 150 * otherwise be used based on this criteria. 151 */ 152 rsn->rsn_mcastcipher = IEEE80211_CIPHER_TKIP; 153 rsn->rsn_mcastkeylen = 128 / NBBY; 154 155 /* 156 * We support both WPA-PSK and 802.1x; the one used 157 * is determined by the authentication mode and the 158 * setting of the PSK state. 159 */ 160 rsn->rsn_keymgmtset = WPA_ASE_8021X_UNSPEC | WPA_ASE_8021X_PSK; 161 rsn->rsn_keymgmt = WPA_ASE_8021X_PSK; 162 163 ic->ic_auth = ieee80211_authenticator_get(ic->ic_bss->ni_authmode); 164} 165 166void 167ieee80211_node_detach(struct ieee80211com *ic) 168{ 169 170 if (ic->ic_bss != NULL) { 171 ieee80211_free_node(ic->ic_bss); 172 ic->ic_bss = NULL; 173 } 174 ieee80211_node_table_cleanup(&ic->ic_sta); 175 if (ic->ic_aid_bitmap != NULL) { 176 FREE(ic->ic_aid_bitmap, M_80211_NODE); 177 ic->ic_aid_bitmap = NULL; 178 } 179} 180 181/* 182 * Port authorize/unauthorize interfaces for use by an authenticator. 183 */ 184 185void 186ieee80211_node_authorize(struct ieee80211_node *ni) 187{ 188 struct ieee80211com *ic = ni->ni_ic; 189 190 ni->ni_flags |= IEEE80211_NODE_AUTH; 191 ni->ni_inact_reload = ic->ic_inact_run; 192 ni->ni_inact = ni->ni_inact_reload; 193} 194 195void 196ieee80211_node_unauthorize(struct ieee80211_node *ni) 197{ 198 struct ieee80211com *ic = ni->ni_ic; 199 200 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 201 ni->ni_inact_reload = ic->ic_inact_auth; 202 if (ni->ni_inact > ni->ni_inact_reload) 203 ni->ni_inact = ni->ni_inact_reload; 204} 205 206/* 207 * Set/change the channel. The rate set is also updated as 208 * to insure a consistent view by drivers. 209 */ 210static void 211ieee80211_node_set_chan(struct ieee80211com *ic, struct ieee80211_node *ni) 212{ 213 struct ieee80211_channel *chan = ic->ic_bsschan; 214 215#if 0 216 KASSERT(chan != IEEE80211_CHAN_ANYC, ("bss channel not setup")); 217#else 218 if (chan == IEEE80211_CHAN_ANYC) /* XXX while scanning */ 219 chan = ic->ic_curchan; 220#endif 221 ni->ni_chan = chan; 222 if (IEEE80211_IS_CHAN_HT(chan)) { 223 /* 224 * XXX Gotta be careful here; the rate set returned by 225 * ieee80211_get_suprates is actually any HT rate 226 * set so blindly copying it will be bad. We must 227 * install the legacy rate est in ni_rates and the 228 * HT rate set in ni_htrates. 229 */ 230 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 231 } 232 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 233} 234 235/* 236 * Probe the curent channel, if allowed, while scanning. 237 * If the channel is not marked passive-only then send 238 * a probe request immediately. Otherwise mark state and 239 * listen for beacons on the channel; if we receive something 240 * then we'll transmit a probe request. 241 */ 242void 243ieee80211_probe_curchan(struct ieee80211com *ic, int force) 244{ 245 struct ifnet *ifp = ic->ic_ifp; 246 247 if ((ic->ic_curchan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0 || force) { 248 /* 249 * XXX send both broadcast+directed probe request 250 */ 251 ieee80211_send_probereq(ic->ic_bss, 252 ic->ic_myaddr, ifp->if_broadcastaddr, 253 ifp->if_broadcastaddr, 254 ic->ic_des_ssid[0].ssid, ic->ic_des_ssid[0].len, 255 ic->ic_opt_ie, ic->ic_opt_ie_len); 256 } else 257 ic->ic_flags_ext |= IEEE80211_FEXT_PROBECHAN; 258} 259 260static __inline void 261copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 262{ 263 /* propagate useful state */ 264 nbss->ni_authmode = obss->ni_authmode; 265 nbss->ni_txpower = obss->ni_txpower; 266 nbss->ni_vlan = obss->ni_vlan; 267 nbss->ni_rsn = obss->ni_rsn; 268 /* XXX statistics? */ 269} 270 271void 272ieee80211_create_ibss(struct ieee80211com* ic, struct ieee80211_channel *chan) 273{ 274 struct ieee80211_node_table *nt; 275 struct ieee80211_node *ni; 276 277 IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 278 "%s: creating ibss\n", __func__); 279 280 /* 281 * Create the station/neighbor table. Note that for adhoc 282 * mode we make the initial inactivity timer longer since 283 * we create nodes only through discovery and they typically 284 * are long-lived associations. 285 */ 286 nt = &ic->ic_sta; 287 IEEE80211_NODE_LOCK(nt); 288 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 289 nt->nt_name = "station"; 290 nt->nt_inact_init = ic->ic_inact_init; 291 } else { 292 nt->nt_name = "neighbor"; 293 nt->nt_inact_init = ic->ic_inact_run; 294 } 295 IEEE80211_NODE_UNLOCK(nt); 296 297 ni = ieee80211_alloc_node(&ic->ic_sta, ic->ic_myaddr); 298 if (ni == NULL) { 299 /* XXX recovery? */ 300 return; 301 } 302 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_myaddr); 303 ni->ni_esslen = ic->ic_des_ssid[0].len; 304 memcpy(ni->ni_essid, ic->ic_des_ssid[0].ssid, ni->ni_esslen); 305 if (ic->ic_bss != NULL) 306 copy_bss(ni, ic->ic_bss); 307 ni->ni_intval = ic->ic_bintval; 308 if (ic->ic_flags & IEEE80211_F_PRIVACY) 309 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 310 if (ic->ic_phytype == IEEE80211_T_FH) { 311 ni->ni_fhdwell = 200; /* XXX */ 312 ni->ni_fhindex = 1; 313 } 314 if (ic->ic_opmode == IEEE80211_M_IBSS) { 315 ic->ic_flags |= IEEE80211_F_SIBSS; 316 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 317 if (ic->ic_flags & IEEE80211_F_DESBSSID) 318 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid); 319 else { 320 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 321 /* clear group bit, add local bit */ 322 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 323 } 324 } else if (ic->ic_opmode == IEEE80211_M_AHDEMO) { 325 if (ic->ic_flags & IEEE80211_F_DESBSSID) 326 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid); 327 else 328 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 329 } 330 /* 331 * Fix the channel and related attributes. 332 */ 333 ic->ic_bsschan = chan; 334 ieee80211_node_set_chan(ic, ni); 335 ic->ic_curmode = ieee80211_chan2mode(chan); 336 /* 337 * Do mode-specific rate setup. 338 */ 339 if (IEEE80211_IS_CHAN_FULL(chan)) { 340 if (IEEE80211_IS_CHAN_ANYG(chan)) { 341 /* 342 * Use a mixed 11b/11g rate set. 343 */ 344 ieee80211_set11gbasicrates(&ni->ni_rates, 345 IEEE80211_MODE_11G); 346 } else if (IEEE80211_IS_CHAN_B(chan)) { 347 /* 348 * Force pure 11b rate set. 349 */ 350 ieee80211_set11gbasicrates(&ni->ni_rates, 351 IEEE80211_MODE_11B); 352 } 353 } 354 355 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 356} 357 358/* 359 * Reset bss state on transition to the INIT state. 360 * Clear any stations from the table (they have been 361 * deauth'd) and reset the bss node (clears key, rate 362 * etc. state). 363 */ 364void 365ieee80211_reset_bss(struct ieee80211com *ic) 366{ 367 struct ieee80211_node *ni, *obss; 368 369 callout_drain(&ic->ic_inact); 370 ieee80211_node_table_reset(&ic->ic_sta); 371 ieee80211_reset_erp(ic); 372 373 ni = ieee80211_alloc_node(&ic->ic_sta, ic->ic_myaddr); 374 KASSERT(ni != NULL, ("unable to setup inital BSS node")); 375 obss = ic->ic_bss; 376 ic->ic_bss = ieee80211_ref_node(ni); 377 if (obss != NULL) { 378 copy_bss(ni, obss); 379 ni->ni_intval = ic->ic_bintval; 380 ieee80211_free_node(obss); 381 } 382} 383 384static int 385match_ssid(const struct ieee80211_node *ni, 386 int nssid, const struct ieee80211_scan_ssid ssids[]) 387{ 388 int i; 389 390 for (i = 0; i < nssid; i++) { 391 if (ni->ni_esslen == ssids[i].len && 392 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 393 return 1; 394 } 395 return 0; 396} 397 398/* 399 * Test a node for suitability/compatibility. 400 */ 401static int 402check_bss(struct ieee80211com *ic, struct ieee80211_node *ni) 403{ 404 uint8_t rate; 405 406 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 407 return 0; 408 if (ic->ic_opmode == IEEE80211_M_IBSS) { 409 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 410 return 0; 411 } else { 412 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 413 return 0; 414 } 415 if (ic->ic_flags & IEEE80211_F_PRIVACY) { 416 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 417 return 0; 418 } else { 419 /* XXX does this mean privacy is supported or required? */ 420 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 421 return 0; 422 } 423 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 424 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 425 if (rate & IEEE80211_RATE_BASIC) 426 return 0; 427 if (ic->ic_des_nssid != 0 && 428 !match_ssid(ni, ic->ic_des_nssid, ic->ic_des_ssid)) 429 return 0; 430 if ((ic->ic_flags & IEEE80211_F_DESBSSID) && 431 !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid)) 432 return 0; 433 return 1; 434} 435 436#ifdef IEEE80211_DEBUG 437/* 438 * Display node suitability/compatibility. 439 */ 440static void 441check_bss_debug(struct ieee80211com *ic, struct ieee80211_node *ni) 442{ 443 uint8_t rate; 444 int fail; 445 446 fail = 0; 447 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 448 fail |= 0x01; 449 if (ic->ic_opmode == IEEE80211_M_IBSS) { 450 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 451 fail |= 0x02; 452 } else { 453 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 454 fail |= 0x02; 455 } 456 if (ic->ic_flags & IEEE80211_F_PRIVACY) { 457 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 458 fail |= 0x04; 459 } else { 460 /* XXX does this mean privacy is supported or required? */ 461 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 462 fail |= 0x04; 463 } 464 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 465 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 466 if (rate & IEEE80211_RATE_BASIC) 467 fail |= 0x08; 468 if (ic->ic_des_nssid != 0 && 469 !match_ssid(ni, ic->ic_des_nssid, ic->ic_des_ssid)) 470 fail |= 0x10; 471 if ((ic->ic_flags & IEEE80211_F_DESBSSID) && 472 !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid)) 473 fail |= 0x20; 474 475 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 476 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 477 printf(" %3d%c", 478 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 479 printf(" %+4d", ni->ni_rssi); 480 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 481 fail & 0x08 ? '!' : ' '); 482 printf(" %4s%c", 483 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 484 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 485 "????", 486 fail & 0x02 ? '!' : ' '); 487 printf(" %3s%c ", 488 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 489 fail & 0x04 ? '!' : ' '); 490 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 491 printf("%s\n", fail & 0x10 ? "!" : ""); 492} 493#endif /* IEEE80211_DEBUG */ 494 495/* 496 * Handle 802.11 ad hoc network merge. The 497 * convention, set by the Wireless Ethernet Compatibility Alliance 498 * (WECA), is that an 802.11 station will change its BSSID to match 499 * the "oldest" 802.11 ad hoc network, on the same channel, that 500 * has the station's desired SSID. The "oldest" 802.11 network 501 * sends beacons with the greatest TSF timestamp. 502 * 503 * The caller is assumed to validate TSF's before attempting a merge. 504 * 505 * Return !0 if the BSSID changed, 0 otherwise. 506 */ 507int 508ieee80211_ibss_merge(struct ieee80211_node *ni) 509{ 510 struct ieee80211com *ic = ni->ni_ic; 511 512 if (ni == ic->ic_bss || 513 IEEE80211_ADDR_EQ(ni->ni_bssid, ic->ic_bss->ni_bssid)) { 514 /* unchanged, nothing to do */ 515 return 0; 516 } 517 if (!check_bss(ic, ni)) { 518 /* capabilities mismatch */ 519 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 520 "%s: merge failed, capabilities mismatch\n", __func__); 521#ifdef IEEE80211_DEBUG 522 if (ieee80211_msg_assoc(ic)) 523 check_bss_debug(ic, ni); 524#endif 525 ic->ic_stats.is_ibss_capmismatch++; 526 return 0; 527 } 528 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 529 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 530 ether_sprintf(ni->ni_bssid), 531 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 532 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 533 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 534 ); 535 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 536} 537 538/* 539 * Join the specified IBSS/BSS network. The node is assumed to 540 * be passed in with a held reference. 541 */ 542static int 543ieee80211_sta_join1(struct ieee80211_node *selbs) 544{ 545 struct ieee80211com *ic = selbs->ni_ic; 546 struct ieee80211_node *obss; 547 int canreassoc; 548 549 if (ic->ic_opmode == IEEE80211_M_IBSS) { 550 struct ieee80211_node_table *nt; 551 /* 552 * Fillin the neighbor table; it will already 553 * exist if we are simply switching mastership. 554 * XXX ic_sta always setup so this is unnecessary? 555 */ 556 nt = &ic->ic_sta; 557 IEEE80211_NODE_LOCK(nt); 558 nt->nt_name = "neighbor"; 559 nt->nt_inact_init = ic->ic_inact_run; 560 IEEE80211_NODE_UNLOCK(nt); 561 } 562 563 /* 564 * Committed to selbs, setup state. 565 */ 566 obss = ic->ic_bss; 567 /* 568 * Check if old+new node have the same address in which 569 * case we can reassociate when operating in sta mode. 570 */ 571 canreassoc = (obss != NULL && 572 ic->ic_state == IEEE80211_S_RUN && 573 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 574 ic->ic_bss = selbs; /* NB: caller assumed to bump refcnt */ 575 if (obss != NULL) { 576 copy_bss(selbs, obss); 577 ieee80211_free_node(obss); 578 } 579 580 /* 581 * Delete unusable rates; we've already checked 582 * that the negotiated rate set is acceptable. 583 */ 584 ieee80211_fix_rate(ic->ic_bss, &ic->ic_bss->ni_rates, 585 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 586 587 ic->ic_bsschan = selbs->ni_chan; 588 ic->ic_curchan = ic->ic_bsschan; 589 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 590 ic->ic_set_channel(ic); 591 /* 592 * Set the erp state (mostly the slot time) to deal with 593 * the auto-select case; this should be redundant if the 594 * mode is locked. 595 */ 596 ieee80211_reset_erp(ic); 597 ieee80211_wme_initparams(ic); 598 599 if (ic->ic_opmode == IEEE80211_M_STA) { 600 if (canreassoc) { 601 /* Reassociate */ 602 ieee80211_new_state(ic, IEEE80211_S_ASSOC, 1); 603 } else { 604 /* 605 * Act as if we received a DEAUTH frame in case we 606 * are invoked from the RUN state. This will cause 607 * us to try to re-authenticate if we are operating 608 * as a station. 609 */ 610 ieee80211_new_state(ic, IEEE80211_S_AUTH, 611 IEEE80211_FC0_SUBTYPE_DEAUTH); 612 } 613 } else 614 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 615 return 1; 616} 617 618int 619ieee80211_sta_join(struct ieee80211com *ic, 620 const struct ieee80211_scan_entry *se) 621{ 622 struct ieee80211_node *ni; 623 624 ni = ieee80211_alloc_node(&ic->ic_sta, se->se_macaddr); 625 if (ni == NULL) { 626 /* XXX msg */ 627 return 0; 628 } 629 /* 630 * Expand scan state into node's format. 631 * XXX may not need all this stuff 632 */ 633 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 634 ni->ni_esslen = se->se_ssid[1]; 635 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 636 ni->ni_rstamp = se->se_rstamp; 637 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 638 ni->ni_intval = se->se_intval; 639 ni->ni_capinfo = se->se_capinfo; 640 /* XXX shift to 11n channel if htinfo present */ 641 ni->ni_chan = se->se_chan; 642 ni->ni_timoff = se->se_timoff; 643 ni->ni_fhdwell = se->se_fhdwell; 644 ni->ni_fhindex = se->se_fhindex; 645 ni->ni_erp = se->se_erp; 646 ni->ni_rssi = se->se_rssi; 647 ni->ni_noise = se->se_noise; 648 if (se->se_htcap_ie != NULL) 649 ieee80211_ht_node_init(ni, se->se_htcap_ie); 650 if (se->se_htinfo_ie != NULL) 651 ieee80211_parse_htinfo(ni, se->se_htinfo_ie); 652 if (se->se_wpa_ie != NULL) 653 ieee80211_saveie(&ni->ni_wpa_ie, se->se_wpa_ie); 654 if (se->se_rsn_ie != NULL) 655 ieee80211_saveie(&ni->ni_rsn_ie, se->se_rsn_ie); 656 if (se->se_wme_ie != NULL) 657 ieee80211_saveie(&ni->ni_wme_ie, se->se_wme_ie); 658 if (se->se_ath_ie != NULL) 659 ieee80211_saveath(ni, se->se_ath_ie); 660 661 ic->ic_dtim_period = se->se_dtimperiod; 662 ic->ic_dtim_count = 0; 663 664 /* NB: must be after ni_chan is setup */ 665 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 666 IEEE80211_F_DOSORT); 667 if (se->se_htcap_ie != NULL) 668 ieee80211_setup_htrates(ni, se->se_htcap_ie, IEEE80211_F_JOIN); 669 if (se->se_htinfo_ie != NULL) 670 ieee80211_setup_basic_htrates(ni, se->se_htinfo_ie); 671 672 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 673} 674 675/* 676 * Leave the specified IBSS/BSS network. The node is assumed to 677 * be passed in with a held reference. 678 */ 679void 680ieee80211_sta_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 681{ 682 ic->ic_node_cleanup(ni); 683 ieee80211_notify_node_leave(ic, ni); 684} 685 686static struct ieee80211_node * 687node_alloc(struct ieee80211_node_table *nt) 688{ 689 struct ieee80211_node *ni; 690 691 MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node), 692 M_80211_NODE, M_NOWAIT | M_ZERO); 693 return ni; 694} 695 696/* 697 * Reclaim any resources in a node and reset any critical 698 * state. Typically nodes are free'd immediately after, 699 * but in some cases the storage may be reused so we need 700 * to insure consistent state (should probably fix that). 701 */ 702static void 703node_cleanup(struct ieee80211_node *ni) 704{ 705#define N(a) (sizeof(a)/sizeof(a[0])) 706 struct ieee80211com *ic = ni->ni_ic; 707 int i; 708 709 /* NB: preserve ni_table */ 710 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 711 ic->ic_ps_sta--; 712 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 713 IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, 714 "[%s] power save mode off, %u sta's in ps mode\n", 715 ether_sprintf(ni->ni_macaddr), ic->ic_ps_sta); 716 } 717 /* 718 * Clear AREF flag that marks the authorization refcnt bump 719 * has happened. This is probably not needed as the node 720 * should always be removed from the table so not found but 721 * do it just in case. 722 */ 723 ni->ni_flags &= ~IEEE80211_NODE_AREF; 724 725 /* 726 * Drain power save queue and, if needed, clear TIM. 727 */ 728 if (ieee80211_node_saveq_drain(ni) != 0 && ic->ic_set_tim != NULL) 729 ic->ic_set_tim(ni, 0); 730 731 ni->ni_associd = 0; 732 if (ni->ni_challenge != NULL) { 733 FREE(ni->ni_challenge, M_80211_NODE); 734 ni->ni_challenge = NULL; 735 } 736 /* 737 * Preserve SSID, WPA, and WME ie's so the bss node is 738 * reusable during a re-auth/re-assoc state transition. 739 * If we remove these data they will not be recreated 740 * because they come from a probe-response or beacon frame 741 * which cannot be expected prior to the association-response. 742 * This should not be an issue when operating in other modes 743 * as stations leaving always go through a full state transition 744 * which will rebuild this state. 745 * 746 * XXX does this leave us open to inheriting old state? 747 */ 748 for (i = 0; i < N(ni->ni_rxfrag); i++) 749 if (ni->ni_rxfrag[i] != NULL) { 750 m_freem(ni->ni_rxfrag[i]); 751 ni->ni_rxfrag[i] = NULL; 752 } 753 /* 754 * Must be careful here to remove any key map entry w/o a LOR. 755 */ 756 ieee80211_node_delucastkey(ni); 757#undef N 758} 759 760static void 761node_free(struct ieee80211_node *ni) 762{ 763 struct ieee80211com *ic = ni->ni_ic; 764 765 ic->ic_node_cleanup(ni); 766 if (ni->ni_wpa_ie != NULL) 767 FREE(ni->ni_wpa_ie, M_80211_NODE); 768 if (ni->ni_rsn_ie != NULL) 769 FREE(ni->ni_rsn_ie, M_80211_NODE); 770 if (ni->ni_wme_ie != NULL) 771 FREE(ni->ni_wme_ie, M_80211_NODE); 772 if (ni->ni_ath_ie != NULL) 773 FREE(ni->ni_ath_ie, M_80211_NODE); 774 IEEE80211_NODE_SAVEQ_DESTROY(ni); 775 FREE(ni, M_80211_NODE); 776} 777 778static int8_t 779node_getrssi(const struct ieee80211_node *ni) 780{ 781 return ni->ni_rssi; 782} 783 784static void 785node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 786{ 787 *rssi = ni->ni_rssi; 788 *noise = ni->ni_noise; 789} 790 791static void 792ieee80211_setup_node(struct ieee80211_node_table *nt, 793 struct ieee80211_node *ni, const uint8_t *macaddr) 794{ 795 struct ieee80211com *ic = nt->nt_ic; 796 int hash; 797 798 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 799 "%s %p<%s> in %s table\n", __func__, ni, 800 ether_sprintf(macaddr), nt->nt_name); 801 802 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 803 hash = IEEE80211_NODE_HASH(macaddr); 804 ieee80211_node_initref(ni); /* mark referenced */ 805 ni->ni_chan = IEEE80211_CHAN_ANYC; 806 ni->ni_authmode = IEEE80211_AUTH_OPEN; 807 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 808 ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 809 ni->ni_inact_reload = nt->nt_inact_init; 810 ni->ni_inact = ni->ni_inact_reload; 811 ni->ni_ath_defkeyix = 0x7fff; 812 IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 813 814 IEEE80211_NODE_LOCK(nt); 815 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 816 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 817 ni->ni_table = nt; 818 ni->ni_ic = ic; 819 IEEE80211_NODE_UNLOCK(nt); 820} 821 822struct ieee80211_node * 823ieee80211_alloc_node(struct ieee80211_node_table *nt, const uint8_t *macaddr) 824{ 825 struct ieee80211com *ic = nt->nt_ic; 826 struct ieee80211_node *ni; 827 828 ni = ic->ic_node_alloc(nt); 829 if (ni != NULL) 830 ieee80211_setup_node(nt, ni, macaddr); 831 else 832 ic->ic_stats.is_rx_nodealloc++; 833 return ni; 834} 835 836/* 837 * Craft a temporary node suitable for sending a management frame 838 * to the specified station. We craft only as much state as we 839 * need to do the work since the node will be immediately reclaimed 840 * once the send completes. 841 */ 842struct ieee80211_node * 843ieee80211_tmp_node(struct ieee80211com *ic, const uint8_t *macaddr) 844{ 845 struct ieee80211_node *ni; 846 847 ni = ic->ic_node_alloc(&ic->ic_sta); 848 if (ni != NULL) { 849 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 850 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 851 852 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 853 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 854 ieee80211_node_initref(ni); /* mark referenced */ 855 ni->ni_txpower = ic->ic_bss->ni_txpower; 856 /* NB: required by ieee80211_fix_rate */ 857 ieee80211_node_set_chan(ic, ni); 858 ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, 859 IEEE80211_KEYIX_NONE); 860 /* XXX optimize away */ 861 IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 862 863 ni->ni_table = NULL; /* NB: pedantic */ 864 ni->ni_ic = ic; 865 } else { 866 /* XXX msg */ 867 ic->ic_stats.is_rx_nodealloc++; 868 } 869 return ni; 870} 871 872struct ieee80211_node * 873ieee80211_dup_bss(struct ieee80211_node_table *nt, const uint8_t *macaddr) 874{ 875 struct ieee80211com *ic = nt->nt_ic; 876 struct ieee80211_node *ni; 877 878 ni = ic->ic_node_alloc(nt); 879 if (ni != NULL) { 880 ieee80211_setup_node(nt, ni, macaddr); 881 /* 882 * Inherit from ic_bss. 883 */ 884 ni->ni_authmode = ic->ic_bss->ni_authmode; 885 ni->ni_txpower = ic->ic_bss->ni_txpower; 886 ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */ 887 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 888 ieee80211_node_set_chan(ic, ni); 889 ni->ni_rsn = ic->ic_bss->ni_rsn; 890 } else 891 ic->ic_stats.is_rx_nodealloc++; 892 return ni; 893} 894 895static struct ieee80211_node * 896#ifdef IEEE80211_DEBUG_REFCNT 897_ieee80211_find_node_debug(struct ieee80211_node_table *nt, 898 const uint8_t *macaddr, const char *func, int line) 899#else 900_ieee80211_find_node(struct ieee80211_node_table *nt, 901 const uint8_t *macaddr) 902#endif 903{ 904 struct ieee80211_node *ni; 905 int hash; 906 907 IEEE80211_NODE_LOCK_ASSERT(nt); 908 909 hash = IEEE80211_NODE_HASH(macaddr); 910 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 911 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 912 ieee80211_ref_node(ni); /* mark referenced */ 913#ifdef IEEE80211_DEBUG_REFCNT 914 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 915 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 916 func, line, 917 ni, ether_sprintf(ni->ni_macaddr), 918 ieee80211_node_refcnt(ni)); 919#endif 920 return ni; 921 } 922 } 923 return NULL; 924} 925#ifdef IEEE80211_DEBUG_REFCNT 926#define _ieee80211_find_node(nt, mac) \ 927 _ieee80211_find_node_debug(nt, mac, func, line) 928#endif 929 930struct ieee80211_node * 931#ifdef IEEE80211_DEBUG_REFCNT 932ieee80211_find_node_debug(struct ieee80211_node_table *nt, 933 const uint8_t *macaddr, const char *func, int line) 934#else 935ieee80211_find_node(struct ieee80211_node_table *nt, const uint8_t *macaddr) 936#endif 937{ 938 struct ieee80211_node *ni; 939 940 IEEE80211_NODE_LOCK(nt); 941 ni = _ieee80211_find_node(nt, macaddr); 942 IEEE80211_NODE_UNLOCK(nt); 943 return ni; 944} 945 946/* 947 * Fake up a node; this handles node discovery in adhoc mode. 948 * Note that for the driver's benefit we we treat this like 949 * an association so the driver has an opportunity to setup 950 * it's private state. 951 */ 952struct ieee80211_node * 953ieee80211_fakeup_adhoc_node(struct ieee80211_node_table *nt, 954 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 955{ 956 struct ieee80211com *ic = nt->nt_ic; 957 struct ieee80211_node *ni; 958 959 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 960 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 961 ni = ieee80211_dup_bss(nt, macaddr); 962 if (ni != NULL) { 963 /* XXX no rate negotiation; just dup */ 964 ni->ni_rates = ic->ic_bss->ni_rates; 965 if (ic->ic_newassoc != NULL) 966 ic->ic_newassoc(ni, 1); 967 if (ic->ic_opmode == IEEE80211_M_AHDEMO) { 968 /* 969 * In adhoc demo mode there are no management 970 * frames to use to discover neighbor capabilities, 971 * so blindly propagate the local configuration 972 * so we can do interesting things (e.g. use 973 * WME to disable ACK's). 974 */ 975 if (ic->ic_flags & IEEE80211_F_WME) 976 ni->ni_flags |= IEEE80211_NODE_QOS; 977 if (ic->ic_flags & IEEE80211_F_FF) 978 ni->ni_flags |= IEEE80211_NODE_FF; 979 } 980 /* XXX not right for 802.1x/WPA */ 981 ieee80211_node_authorize(ni); 982 } 983 return ni; 984} 985 986void 987ieee80211_init_neighbor(struct ieee80211_node *ni, 988 const struct ieee80211_frame *wh, 989 const struct ieee80211_scanparams *sp) 990{ 991 ni->ni_esslen = sp->ssid[1]; 992 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 993 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 994 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 995 ni->ni_intval = sp->bintval; 996 ni->ni_capinfo = sp->capinfo; 997 ni->ni_chan = ni->ni_ic->ic_curchan; 998 ni->ni_fhdwell = sp->fhdwell; 999 ni->ni_fhindex = sp->fhindex; 1000 ni->ni_erp = sp->erp; 1001 ni->ni_timoff = sp->timoff; 1002 if (sp->wme != NULL) 1003 ieee80211_saveie(&ni->ni_wme_ie, sp->wme); 1004 if (sp->wpa != NULL) 1005 ieee80211_saveie(&ni->ni_wpa_ie, sp->wpa); 1006 if (sp->rsn != NULL) 1007 ieee80211_saveie(&ni->ni_rsn_ie, sp->rsn); 1008 if (sp->ath != NULL) 1009 ieee80211_saveath(ni, sp->ath); 1010 1011 /* NB: must be after ni_chan is setup */ 1012 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1013 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1014 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1015} 1016 1017/* 1018 * Do node discovery in adhoc mode on receipt of a beacon 1019 * or probe response frame. Note that for the driver's 1020 * benefit we we treat this like an association so the 1021 * driver has an opportunity to setup it's private state. 1022 */ 1023struct ieee80211_node * 1024ieee80211_add_neighbor(struct ieee80211com *ic, 1025 const struct ieee80211_frame *wh, 1026 const struct ieee80211_scanparams *sp) 1027{ 1028 struct ieee80211_node *ni; 1029 1030 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1031 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1032 ni = ieee80211_dup_bss(&ic->ic_sta, wh->i_addr2);/* XXX alloc_node? */ 1033 if (ni != NULL) { 1034 ieee80211_init_neighbor(ni, wh, sp); 1035 if (ic->ic_newassoc != NULL) 1036 ic->ic_newassoc(ni, 1); 1037 /* XXX not right for 802.1x/WPA */ 1038 ieee80211_node_authorize(ni); 1039 } 1040 return ni; 1041} 1042 1043#define IS_CTL(wh) \ 1044 ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) 1045#define IS_PSPOLL(wh) \ 1046 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) 1047#define IS_BAR(wh) \ 1048 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_BAR) 1049 1050/* 1051 * Locate the node for sender, track state, and then pass the 1052 * (referenced) node up to the 802.11 layer for its use. We 1053 * are required to pass some node so we fall back to ic_bss 1054 * when this frame is from an unknown sender. The 802.11 layer 1055 * knows this means the sender wasn't in the node table and 1056 * acts accordingly. 1057 */ 1058struct ieee80211_node * 1059#ifdef IEEE80211_DEBUG_REFCNT 1060ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1061 const struct ieee80211_frame_min *wh, const char *func, int line) 1062#else 1063ieee80211_find_rxnode(struct ieee80211com *ic, 1064 const struct ieee80211_frame_min *wh) 1065#endif 1066{ 1067 struct ieee80211_node_table *nt; 1068 struct ieee80211_node *ni; 1069 1070 /* XXX check ic_bss first in station mode */ 1071 /* XXX 4-address frames? */ 1072 nt = &ic->ic_sta; 1073 IEEE80211_NODE_LOCK(nt); 1074 if (IS_CTL(wh) && !IS_PSPOLL(wh) && !IS_BAR(wh) /*&& !IS_RTS(ah)*/) 1075 ni = _ieee80211_find_node(nt, wh->i_addr1); 1076 else 1077 ni = _ieee80211_find_node(nt, wh->i_addr2); 1078 if (ni == NULL) 1079 ni = ieee80211_ref_node(ic->ic_bss); 1080 IEEE80211_NODE_UNLOCK(nt); 1081 1082 return ni; 1083} 1084 1085/* 1086 * Like ieee80211_find_rxnode but use the supplied h/w 1087 * key index as a hint to locate the node in the key 1088 * mapping table. If an entry is present at the key 1089 * index we return it; otherwise do a normal lookup and 1090 * update the mapping table if the station has a unicast 1091 * key assigned to it. 1092 */ 1093struct ieee80211_node * 1094#ifdef IEEE80211_DEBUG_REFCNT 1095ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1096 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1097 const char *func, int line) 1098#else 1099ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1100 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1101#endif 1102{ 1103 struct ieee80211_node_table *nt; 1104 struct ieee80211_node *ni; 1105 1106 nt = &ic->ic_sta; 1107 IEEE80211_NODE_LOCK(nt); 1108 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1109 ni = nt->nt_keyixmap[keyix]; 1110 else 1111 ni = NULL; 1112 if (ni == NULL) { 1113 if (IS_CTL(wh) && !IS_PSPOLL(wh) && !IS_BAR(wh) /*&& !IS_RTS(ah)*/) 1114 ni = _ieee80211_find_node(nt, wh->i_addr1); 1115 else 1116 ni = _ieee80211_find_node(nt, wh->i_addr2); 1117 if (ni == NULL) 1118 ni = ieee80211_ref_node(ic->ic_bss); 1119 if (nt->nt_keyixmap != NULL) { 1120 /* 1121 * If the station has a unicast key cache slot 1122 * assigned update the key->node mapping table. 1123 */ 1124 keyix = ni->ni_ucastkey.wk_rxkeyix; 1125 /* XXX can keyixmap[keyix] != NULL? */ 1126 if (keyix < nt->nt_keyixmax && 1127 nt->nt_keyixmap[keyix] == NULL) { 1128 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1129 "%s: add key map entry %p<%s> refcnt %d\n", 1130 __func__, ni, ether_sprintf(ni->ni_macaddr), 1131 ieee80211_node_refcnt(ni)+1); 1132 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1133 } 1134 } 1135 } else 1136 ieee80211_ref_node(ni); 1137 IEEE80211_NODE_UNLOCK(nt); 1138 1139 return ni; 1140} 1141#undef IS_BAR 1142#undef IS_PSPOLL 1143#undef IS_CTL 1144 1145/* 1146 * Return a reference to the appropriate node for sending 1147 * a data frame. This handles node discovery in adhoc networks. 1148 */ 1149struct ieee80211_node * 1150#ifdef IEEE80211_DEBUG_REFCNT 1151ieee80211_find_txnode_debug(struct ieee80211com *ic, const uint8_t *macaddr, 1152 const char *func, int line) 1153#else 1154ieee80211_find_txnode(struct ieee80211com *ic, const uint8_t *macaddr) 1155#endif 1156{ 1157 struct ieee80211_node_table *nt = &ic->ic_sta; 1158 struct ieee80211_node *ni; 1159 1160 /* 1161 * The destination address should be in the node table 1162 * unless this is a multicast/broadcast frame. We can 1163 * also optimize station mode operation, all frames go 1164 * to the bss node. 1165 */ 1166 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1167 IEEE80211_NODE_LOCK(nt); 1168 if (ic->ic_opmode == IEEE80211_M_STA || IEEE80211_IS_MULTICAST(macaddr)) 1169 ni = ieee80211_ref_node(ic->ic_bss); 1170 else { 1171 ni = _ieee80211_find_node(nt, macaddr); 1172 if (ic->ic_opmode == IEEE80211_M_HOSTAP && 1173 (ni != NULL && ni->ni_associd == 0)) { 1174 /* 1175 * Station is not associated; don't permit the 1176 * data frame to be sent by returning NULL. This 1177 * is kinda a kludge but the least intrusive way 1178 * to add this check into all drivers. 1179 */ 1180 ieee80211_unref_node(&ni); /* NB: null's ni */ 1181 } 1182 } 1183 IEEE80211_NODE_UNLOCK(nt); 1184 1185 if (ni == NULL) { 1186 if (ic->ic_opmode == IEEE80211_M_IBSS || 1187 ic->ic_opmode == IEEE80211_M_AHDEMO) { 1188 /* 1189 * In adhoc mode cons up a node for the destination. 1190 * Note that we need an additional reference for the 1191 * caller to be consistent with _ieee80211_find_node. 1192 */ 1193 ni = ieee80211_fakeup_adhoc_node(nt, macaddr); 1194 if (ni != NULL) 1195 (void) ieee80211_ref_node(ni); 1196 } else { 1197 IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT, 1198 "[%s] no node, discard frame (%s)\n", 1199 ether_sprintf(macaddr), __func__); 1200 ic->ic_stats.is_tx_nonode++; 1201 } 1202 } 1203 return ni; 1204} 1205 1206/* 1207 * Like find but search based on the ssid too. 1208 */ 1209struct ieee80211_node * 1210#ifdef IEEE80211_DEBUG_REFCNT 1211ieee80211_find_node_with_ssid_debug(struct ieee80211_node_table *nt, 1212 const uint8_t *macaddr, u_int ssidlen, const uint8_t *ssid, 1213 const char *func, int line) 1214#else 1215ieee80211_find_node_with_ssid(struct ieee80211_node_table *nt, 1216 const uint8_t *macaddr, u_int ssidlen, const uint8_t *ssid) 1217#endif 1218{ 1219#define MATCH_SSID(ni, ssid, ssidlen) \ 1220 (ni->ni_esslen == ssidlen && memcmp(ni->ni_essid, ssid, ssidlen) == 0) 1221 static const uint8_t zeromac[IEEE80211_ADDR_LEN]; 1222 struct ieee80211_node *ni; 1223 int hash; 1224 1225 IEEE80211_NODE_LOCK(nt); 1226 /* 1227 * A mac address that is all zero means match only the ssid; 1228 * otherwise we must match both. 1229 */ 1230 if (IEEE80211_ADDR_EQ(macaddr, zeromac)) { 1231 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1232 if (MATCH_SSID(ni, ssid, ssidlen)) 1233 break; 1234 } 1235 } else { 1236 hash = IEEE80211_NODE_HASH(macaddr); 1237 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1238 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && 1239 MATCH_SSID(ni, ssid, ssidlen)) 1240 break; 1241 } 1242 } 1243 if (ni != NULL) { 1244 ieee80211_ref_node(ni); /* mark referenced */ 1245 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1246 REFCNT_LOC, ni, ether_sprintf(ni->ni_macaddr), 1247 ieee80211_node_refcnt(ni)); 1248 } 1249 IEEE80211_NODE_UNLOCK(nt); 1250 return ni; 1251#undef MATCH_SSID 1252} 1253 1254static void 1255_ieee80211_free_node(struct ieee80211_node *ni) 1256{ 1257 struct ieee80211com *ic = ni->ni_ic; 1258 struct ieee80211_node_table *nt = ni->ni_table; 1259 1260 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1261 "%s %p<%s> in %s table\n", __func__, ni, 1262 ether_sprintf(ni->ni_macaddr), 1263 nt != NULL ? nt->nt_name : "<gone>"); 1264 1265 IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1266 if (nt != NULL) { 1267 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1268 LIST_REMOVE(ni, ni_hash); 1269 } 1270 ic->ic_node_free(ni); 1271} 1272 1273void 1274#ifdef IEEE80211_DEBUG_REFCNT 1275ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1276#else 1277ieee80211_free_node(struct ieee80211_node *ni) 1278#endif 1279{ 1280 struct ieee80211_node_table *nt = ni->ni_table; 1281 1282#ifdef IEEE80211_DEBUG_REFCNT 1283 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1284 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1285 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1286#endif 1287 if (nt != NULL) { 1288 IEEE80211_NODE_LOCK(nt); 1289 if (ieee80211_node_dectestref(ni)) { 1290 /* 1291 * Last reference, reclaim state. 1292 */ 1293 _ieee80211_free_node(ni); 1294 } else if (ieee80211_node_refcnt(ni) == 1 && 1295 nt->nt_keyixmap != NULL) { 1296 ieee80211_keyix keyix; 1297 /* 1298 * Check for a last reference in the key mapping table. 1299 */ 1300 keyix = ni->ni_ucastkey.wk_rxkeyix; 1301 if (keyix < nt->nt_keyixmax && 1302 nt->nt_keyixmap[keyix] == ni) { 1303 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1304 "%s: %p<%s> clear key map entry", __func__, 1305 ni, ether_sprintf(ni->ni_macaddr)); 1306 nt->nt_keyixmap[keyix] = NULL; 1307 ieee80211_node_decref(ni); /* XXX needed? */ 1308 _ieee80211_free_node(ni); 1309 } 1310 } 1311 IEEE80211_NODE_UNLOCK(nt); 1312 } else { 1313 if (ieee80211_node_dectestref(ni)) 1314 _ieee80211_free_node(ni); 1315 } 1316} 1317 1318/* 1319 * Reclaim a unicast key and clear any key cache state. 1320 */ 1321int 1322ieee80211_node_delucastkey(struct ieee80211_node *ni) 1323{ 1324 struct ieee80211com *ic = ni->ni_ic; 1325 struct ieee80211_node_table *nt = &ic->ic_sta; 1326 struct ieee80211_node *nikey; 1327 ieee80211_keyix keyix; 1328 int isowned, status; 1329 1330 /* 1331 * NB: We must beware of LOR here; deleting the key 1332 * can cause the crypto layer to block traffic updates 1333 * which can generate a LOR against the node table lock; 1334 * grab it here and stash the key index for our use below. 1335 * 1336 * Must also beware of recursion on the node table lock. 1337 * When called from node_cleanup we may already have 1338 * the node table lock held. Unfortunately there's no 1339 * way to separate out this path so we must do this 1340 * conditionally. 1341 */ 1342 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1343 if (!isowned) 1344 IEEE80211_NODE_LOCK(nt); 1345 keyix = ni->ni_ucastkey.wk_rxkeyix; 1346 status = ieee80211_crypto_delkey(ic, &ni->ni_ucastkey); 1347 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1348 nikey = nt->nt_keyixmap[keyix]; 1349 nt->nt_keyixmap[keyix] = NULL;; 1350 } else 1351 nikey = NULL; 1352 if (!isowned) 1353 IEEE80211_NODE_UNLOCK(&ic->ic_sta); 1354 1355 if (nikey != NULL) { 1356 KASSERT(nikey == ni, 1357 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1358 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1359 "%s: delete key map entry %p<%s> refcnt %d\n", 1360 __func__, ni, ether_sprintf(ni->ni_macaddr), 1361 ieee80211_node_refcnt(ni)-1); 1362 ieee80211_free_node(ni); 1363 } 1364 return status; 1365} 1366 1367/* 1368 * Reclaim a node. If this is the last reference count then 1369 * do the normal free work. Otherwise remove it from the node 1370 * table and mark it gone by clearing the back-reference. 1371 */ 1372static void 1373node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1374{ 1375 ieee80211_keyix keyix; 1376 1377 IEEE80211_NODE_LOCK_ASSERT(nt); 1378 1379 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1380 "%s: remove %p<%s> from %s table, refcnt %d\n", 1381 __func__, ni, ether_sprintf(ni->ni_macaddr), 1382 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1383 /* 1384 * Clear any entry in the unicast key mapping table. 1385 * We need to do it here so rx lookups don't find it 1386 * in the mapping table even if it's not in the hash 1387 * table. We cannot depend on the mapping table entry 1388 * being cleared because the node may not be free'd. 1389 */ 1390 keyix = ni->ni_ucastkey.wk_rxkeyix; 1391 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1392 nt->nt_keyixmap[keyix] == ni) { 1393 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1394 "%s: %p<%s> clear key map entry\n", 1395 __func__, ni, ether_sprintf(ni->ni_macaddr)); 1396 nt->nt_keyixmap[keyix] = NULL; 1397 ieee80211_node_decref(ni); /* NB: don't need free */ 1398 } 1399 if (!ieee80211_node_dectestref(ni)) { 1400 /* 1401 * Other references are present, just remove the 1402 * node from the table so it cannot be found. When 1403 * the references are dropped storage will be 1404 * reclaimed. 1405 */ 1406 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1407 LIST_REMOVE(ni, ni_hash); 1408 ni->ni_table = NULL; /* clear reference */ 1409 } else 1410 _ieee80211_free_node(ni); 1411} 1412 1413static void 1414ieee80211_free_allnodes_locked(struct ieee80211_node_table *nt) 1415{ 1416 struct ieee80211com *ic = nt->nt_ic; 1417 struct ieee80211_node *ni; 1418 1419 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1420 "%s: free all nodes in %s table\n", __func__, nt->nt_name); 1421 1422 while ((ni = TAILQ_FIRST(&nt->nt_node)) != NULL) { 1423 if (ni->ni_associd != 0) { 1424 if (ic->ic_auth->ia_node_leave != NULL) 1425 ic->ic_auth->ia_node_leave(ic, ni); 1426 IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1427 } 1428 node_reclaim(nt, ni); 1429 } 1430} 1431 1432/* 1433 * Timeout inactive stations and do related housekeeping. 1434 * Note that we cannot hold the node lock while sending a 1435 * frame as this would lead to a LOR. Instead we use a 1436 * generation number to mark nodes that we've scanned and 1437 * drop the lock and restart a scan if we have to time out 1438 * a node. Since we are single-threaded by virtue of 1439 * controlling the inactivity timer we can be sure this will 1440 * process each node only once. 1441 */ 1442static void 1443ieee80211_timeout_stations(struct ieee80211_node_table *nt) 1444{ 1445 struct ieee80211com *ic = nt->nt_ic; 1446 struct ieee80211_node *ni; 1447 u_int gen; 1448 int isadhoc; 1449 1450 isadhoc = (ic->ic_opmode == IEEE80211_M_IBSS || 1451 ic->ic_opmode == IEEE80211_M_AHDEMO); 1452 IEEE80211_SCAN_LOCK(nt); 1453 gen = ++nt->nt_scangen; 1454restart: 1455 IEEE80211_NODE_LOCK(nt); 1456 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1457 if (ni->ni_scangen == gen) /* previously handled */ 1458 continue; 1459 ni->ni_scangen = gen; 1460 /* 1461 * Ignore entries for which have yet to receive an 1462 * authentication frame. These are transient and 1463 * will be reclaimed when the last reference to them 1464 * goes away (when frame xmits complete). 1465 */ 1466 if ((ic->ic_opmode == IEEE80211_M_HOSTAP || 1467 ic->ic_opmode == IEEE80211_M_STA) && 1468 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1469 continue; 1470 /* 1471 * Free fragment if not needed anymore 1472 * (last fragment older than 1s). 1473 * XXX doesn't belong here 1474 */ 1475 if (ni->ni_rxfrag[0] != NULL && 1476 ticks > ni->ni_rxfragstamp + hz) { 1477 m_freem(ni->ni_rxfrag[0]); 1478 ni->ni_rxfrag[0] = NULL; 1479 } 1480 if (ni->ni_inact > 0) 1481 ni->ni_inact--; 1482 /* 1483 * Special case ourself; we may be idle for extended periods 1484 * of time and regardless reclaiming our state is wrong. 1485 */ 1486 if (ni == ic->ic_bss) 1487 continue; 1488 if (ni->ni_associd != 0 || isadhoc) { 1489 /* 1490 * Age frames on the power save queue. 1491 */ 1492 if (ieee80211_node_saveq_age(ni) != 0 && 1493 IEEE80211_NODE_SAVEQ_QLEN(ni) == 0 && 1494 ic->ic_set_tim != NULL) 1495 ic->ic_set_tim(ni, 0); 1496 /* 1497 * Probe the station before time it out. We 1498 * send a null data frame which may not be 1499 * universally supported by drivers (need it 1500 * for ps-poll support so it should be...). 1501 * 1502 * XXX don't probe the station unless we've 1503 * received a frame from them (and have 1504 * some idea of the rates they are capable 1505 * of); this will get fixed more properly 1506 * soon with better handling of the rate set. 1507 */ 1508 if ((ic->ic_flags_ext & IEEE80211_FEXT_INACT) && 1509 (0 < ni->ni_inact && 1510 ni->ni_inact <= ic->ic_inact_probe) && 1511 ni->ni_rates.rs_nrates != 0) { 1512 IEEE80211_NOTE(ic, 1513 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1514 ni, "%s", 1515 "probe station due to inactivity"); 1516 /* 1517 * Grab a reference before unlocking the table 1518 * so the node cannot be reclaimed before we 1519 * send the frame. ieee80211_send_nulldata 1520 * understands we've done this and reclaims the 1521 * ref for us as needed. 1522 */ 1523 ieee80211_ref_node(ni); 1524 IEEE80211_NODE_UNLOCK(nt); 1525 ieee80211_send_nulldata(ni); 1526 /* XXX stat? */ 1527 goto restart; 1528 } 1529 } 1530 if ((ic->ic_flags_ext & IEEE80211_FEXT_INACT) && 1531 ni->ni_inact <= 0) { 1532 IEEE80211_NOTE(ic, 1533 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 1534 "station timed out due to inactivity " 1535 "(refcnt %u)", ieee80211_node_refcnt(ni)); 1536 /* 1537 * Send a deauthenticate frame and drop the station. 1538 * This is somewhat complicated due to reference counts 1539 * and locking. At this point a station will typically 1540 * have a reference count of 1. ieee80211_node_leave 1541 * will do a "free" of the node which will drop the 1542 * reference count. But in the meantime a reference 1543 * wil be held by the deauth frame. The actual reclaim 1544 * of the node will happen either after the tx is 1545 * completed or by ieee80211_node_leave. 1546 * 1547 * Separately we must drop the node lock before sending 1548 * in case the driver takes a lock, as this can result 1549 * in a LOR between the node lock and the driver lock. 1550 */ 1551 IEEE80211_NODE_UNLOCK(nt); 1552 if (ni->ni_associd != 0) { 1553 IEEE80211_SEND_MGMT(ic, ni, 1554 IEEE80211_FC0_SUBTYPE_DEAUTH, 1555 IEEE80211_REASON_AUTH_EXPIRE); 1556 } 1557 ieee80211_node_leave(ic, ni); 1558 ic->ic_stats.is_node_timeout++; 1559 goto restart; 1560 } 1561 } 1562 IEEE80211_NODE_UNLOCK(nt); 1563 1564 IEEE80211_SCAN_UNLOCK(nt); 1565} 1566 1567void 1568ieee80211_node_timeout(void *arg) 1569{ 1570 struct ieee80211com *ic = arg; 1571 1572 ieee80211_scan_timeout(ic); 1573 ieee80211_timeout_stations(&ic->ic_sta); 1574 1575 IEEE80211_LOCK(ic); 1576 ieee80211_erp_timeout(ic); 1577 IEEE80211_UNLOCK(ic); 1578 1579 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 1580 ieee80211_node_timeout, ic); 1581} 1582 1583void 1584ieee80211_iterate_nodes(struct ieee80211_node_table *nt, ieee80211_iter_func *f, void *arg) 1585{ 1586 struct ieee80211_node *ni; 1587 u_int gen; 1588 1589 IEEE80211_SCAN_LOCK(nt); 1590 gen = ++nt->nt_scangen; 1591restart: 1592 IEEE80211_NODE_LOCK(nt); 1593 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1594 if (ni->ni_scangen != gen) { 1595 ni->ni_scangen = gen; 1596 (void) ieee80211_ref_node(ni); 1597 IEEE80211_NODE_UNLOCK(nt); 1598 (*f)(arg, ni); 1599 ieee80211_free_node(ni); 1600 goto restart; 1601 } 1602 } 1603 IEEE80211_NODE_UNLOCK(nt); 1604 1605 IEEE80211_SCAN_UNLOCK(nt); 1606} 1607 1608void 1609ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1610{ 1611 printf("0x%p: mac %s refcnt %d\n", ni, 1612 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 1613 printf("\tscangen %u authmode %u flags 0x%x\n", 1614 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 1615 printf("\tassocid 0x%x txpower %u vlan %u\n", 1616 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 1617 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 1618 ni->ni_txseqs[IEEE80211_NONQOS_TID], 1619 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 1620 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 1621 ni->ni_rxfragstamp); 1622 printf("\trstamp %u rssi %d noise %d intval %u capinfo 0x%x\n", 1623 ni->ni_rstamp, ni->ni_rssi, ni->ni_noise, 1624 ni->ni_intval, ni->ni_capinfo); 1625 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 1626 ether_sprintf(ni->ni_bssid), 1627 ni->ni_esslen, ni->ni_essid, 1628 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 1629 printf("\tfails %u inact %u txrate %u\n", 1630 ni->ni_fails, ni->ni_inact, ni->ni_txrate); 1631 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 1632 ni->ni_htcap, ni->ni_htparam, 1633 ni->ni_htctlchan, ni->ni_ht2ndchan); 1634 printf("\thtopmode %x htstbc %x chw %u\n", 1635 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 1636} 1637 1638void 1639ieee80211_dump_nodes(struct ieee80211_node_table *nt) 1640{ 1641 ieee80211_iterate_nodes(nt, 1642 (ieee80211_iter_func *) ieee80211_dump_node, nt); 1643} 1644 1645void 1646ieee80211_notify_erp(struct ieee80211com *ic) 1647{ 1648 if (ic->ic_opmode == IEEE80211_M_HOSTAP) 1649 ieee80211_beacon_notify(ic, IEEE80211_BEACON_ERP); 1650} 1651 1652/* 1653 * Handle a station joining an 11g network. 1654 */ 1655static void 1656ieee80211_node_join_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 1657{ 1658 1659 /* 1660 * Station isn't capable of short slot time. Bump 1661 * the count of long slot time stations and disable 1662 * use of short slot time. Note that the actual switch 1663 * over to long slot time use may not occur until the 1664 * next beacon transmission (per sec. 7.3.1.4 of 11g). 1665 */ 1666 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 1667 ic->ic_longslotsta++; 1668 IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC, ni, 1669 "station needs long slot time, count %d", 1670 ic->ic_longslotsta); 1671 /* XXX vap's w/ conflicting needs won't work */ 1672 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 1673 /* 1674 * Don't force slot time when switched to turbo 1675 * mode as non-ERP stations won't be present; this 1676 * need only be done when on the normal G channel. 1677 */ 1678 ieee80211_set_shortslottime(ic, 0); 1679 } 1680 } 1681 /* 1682 * If the new station is not an ERP station 1683 * then bump the counter and enable protection 1684 * if configured. 1685 */ 1686 if (!ieee80211_iserp_rateset(ic, &ni->ni_rates)) { 1687 ic->ic_nonerpsta++; 1688 IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC, ni, 1689 "station is !ERP, %d non-ERP stations associated", 1690 ic->ic_nonerpsta); 1691 /* 1692 * If station does not support short preamble 1693 * then we must enable use of Barker preamble. 1694 */ 1695 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 1696 IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC, ni, 1697 "%s", "station needs long preamble"); 1698 ic->ic_flags |= IEEE80211_F_USEBARKER; 1699 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1700 } 1701 /* 1702 * If protection is configured, enable it. 1703 */ 1704 if (ic->ic_protmode != IEEE80211_PROT_NONE && 1705 ic->ic_nonerpsta == 1 && 1706 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 1707 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1708 "%s: enable use of protection\n", __func__); 1709 ic->ic_flags |= IEEE80211_F_USEPROT; 1710 ieee80211_notify_erp(ic); 1711 } 1712 } else 1713 ni->ni_flags |= IEEE80211_NODE_ERP; 1714} 1715 1716void 1717ieee80211_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int resp) 1718{ 1719 int newassoc; 1720 1721 if (ni->ni_associd == 0) { 1722 uint16_t aid; 1723 1724 /* 1725 * It would be good to search the bitmap 1726 * more efficiently, but this will do for now. 1727 */ 1728 for (aid = 1; aid < ic->ic_max_aid; aid++) { 1729 if (!IEEE80211_AID_ISSET(aid, 1730 ic->ic_aid_bitmap)) 1731 break; 1732 } 1733 if (aid >= ic->ic_max_aid) { 1734 IEEE80211_SEND_MGMT(ic, ni, resp, 1735 IEEE80211_REASON_ASSOC_TOOMANY); 1736 ieee80211_node_leave(ic, ni); 1737 return; 1738 } 1739 ni->ni_associd = aid | 0xc000; 1740 IEEE80211_AID_SET(ni->ni_associd, ic->ic_aid_bitmap); 1741 ic->ic_sta_assoc++; 1742 newassoc = 1; 1743 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 1744 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 1745 ieee80211_node_join_11g(ic, ni); 1746 } else 1747 newassoc = 0; 1748 1749 IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 1750 "station %sassociated at aid %d: %s preamble, %s slot time%s%s%s%s%s", 1751 newassoc ? "" : "re", 1752 IEEE80211_NODE_AID(ni), 1753 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 1754 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 1755 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 1756 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 1757 ni->ni_flags & IEEE80211_NODE_HT ? 1758 (ni->ni_chw == 20 ? ", HT20" : ", HT40") : "", 1759 IEEE80211_ATH_CAP(ic, ni, IEEE80211_NODE_FF) ? 1760 ", fast-frames" : "", 1761 IEEE80211_ATH_CAP(ic, ni, IEEE80211_NODE_TURBOP) ? 1762 ", turbo" : "" 1763 ); 1764 1765 /* give driver a chance to setup state like ni_txrate */ 1766 if (ic->ic_newassoc != NULL) 1767 ic->ic_newassoc(ni, newassoc); 1768 IEEE80211_SEND_MGMT(ic, ni, resp, IEEE80211_STATUS_SUCCESS); 1769 /* tell the authenticator about new station */ 1770 if (ic->ic_auth->ia_node_join != NULL) 1771 ic->ic_auth->ia_node_join(ic, ni); 1772 ieee80211_notify_node_join(ic, ni, newassoc); 1773} 1774 1775static void 1776disable_protection(struct ieee80211com *ic) 1777{ 1778 KASSERT(ic->ic_nonerpsta == 0 && 1779 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 1780 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 1781 ic->ic_flags_ext)); 1782 1783 ic->ic_flags &= ~IEEE80211_F_USEPROT; 1784 /* XXX verify mode? */ 1785 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 1786 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1787 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1788 } 1789 ieee80211_notify_erp(ic); 1790} 1791 1792/* 1793 * Handle a station leaving an 11g network. 1794 */ 1795static void 1796ieee80211_node_leave_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 1797{ 1798 1799 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 1800 ("not in 11g, bss %u:0x%x, curmode %u", ic->ic_bsschan->ic_freq, 1801 ic->ic_bsschan->ic_flags, ic->ic_curmode)); 1802 1803 /* 1804 * If a long slot station do the slot time bookkeeping. 1805 */ 1806 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 1807 KASSERT(ic->ic_longslotsta > 0, 1808 ("bogus long slot station count %d", ic->ic_longslotsta)); 1809 ic->ic_longslotsta--; 1810 IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC, ni, 1811 "long slot time station leaves, count now %d", 1812 ic->ic_longslotsta); 1813 if (ic->ic_longslotsta == 0) { 1814 /* 1815 * Re-enable use of short slot time if supported 1816 * and not operating in IBSS mode (per spec). 1817 */ 1818 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 1819 ic->ic_opmode != IEEE80211_M_IBSS) { 1820 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1821 "%s: re-enable use of short slot time\n", 1822 __func__); 1823 ieee80211_set_shortslottime(ic, 1); 1824 } 1825 } 1826 } 1827 /* 1828 * If a non-ERP station do the protection-related bookkeeping. 1829 */ 1830 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 1831 KASSERT(ic->ic_nonerpsta > 0, 1832 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 1833 ic->ic_nonerpsta--; 1834 IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC, ni, 1835 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 1836 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 1837 " (non-ERP sta present)" : ""); 1838 if (ic->ic_nonerpsta == 0 && 1839 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 1840 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1841 "%s: disable use of protection\n", __func__); 1842 disable_protection(ic); 1843 } 1844 } 1845} 1846 1847/* 1848 * Time out presence of an overlapping bss with non-ERP 1849 * stations. When operating in hostap mode we listen for 1850 * beacons from other stations and if we identify a non-ERP 1851 * station is present we enable protection. To identify 1852 * when all non-ERP stations are gone we time out this 1853 * condition. 1854 */ 1855static void 1856ieee80211_erp_timeout(struct ieee80211com *ic) 1857{ 1858 1859 IEEE80211_LOCK_ASSERT(ic); 1860 1861 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 1862 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 1863 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1864 "%s\n", "age out non-ERP sta present on channel"); 1865 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 1866 if (ic->ic_nonerpsta == 0) 1867 disable_protection(ic); 1868 } 1869} 1870 1871/* 1872 * Handle bookkeeping for station deauthentication/disassociation 1873 * when operating as an ap. 1874 */ 1875void 1876ieee80211_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 1877{ 1878 struct ieee80211_node_table *nt = ni->ni_table; 1879 1880 IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 1881 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 1882 1883 KASSERT(ic->ic_opmode != IEEE80211_M_STA, 1884 ("unexpected operating mode %u", ic->ic_opmode)); 1885 /* 1886 * If node wasn't previously associated all 1887 * we need to do is reclaim the reference. 1888 */ 1889 /* XXX ibss mode bypasses 11g and notification */ 1890 if (ni->ni_associd == 0) 1891 goto done; 1892 /* 1893 * Tell the authenticator the station is leaving. 1894 * Note that we must do this before yanking the 1895 * association id as the authenticator uses the 1896 * associd to locate it's state block. 1897 */ 1898 if (ic->ic_auth->ia_node_leave != NULL) 1899 ic->ic_auth->ia_node_leave(ic, ni); 1900 IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1901 ni->ni_associd = 0; 1902 ic->ic_sta_assoc--; 1903 1904 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 1905 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 1906 ieee80211_node_leave_11g(ic, ni); 1907 /* 1908 * Cleanup station state. In particular clear various 1909 * state that might otherwise be reused if the node 1910 * is reused before the reference count goes to zero 1911 * (and memory is reclaimed). 1912 */ 1913 ieee80211_sta_leave(ic, ni); 1914done: 1915 /* 1916 * Remove the node from any table it's recorded in and 1917 * drop the caller's reference. Removal from the table 1918 * is important to insure the node is not reprocessed 1919 * for inactivity. 1920 */ 1921 if (nt != NULL) { 1922 IEEE80211_NODE_LOCK(nt); 1923 node_reclaim(nt, ni); 1924 IEEE80211_NODE_UNLOCK(nt); 1925 } else 1926 ieee80211_free_node(ni); 1927} 1928 1929int8_t 1930ieee80211_getrssi(struct ieee80211com *ic) 1931{ 1932#define NZ(x) ((x) == 0 ? 1 : (x)) 1933 struct ieee80211_node_table *nt = &ic->ic_sta; 1934 int rssi_samples; 1935 int32_t rssi_total; 1936 struct ieee80211_node *ni; 1937 1938 rssi_total = 0; 1939 rssi_samples = 0; 1940 switch (ic->ic_opmode) { 1941 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 1942 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 1943 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 1944 /* XXX locking */ 1945 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) 1946 if (ic->ic_opmode == IEEE80211_M_HOSTAP || 1947 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS)) { 1948 int8_t rssi = ic->ic_node_getrssi(ni); 1949 if (rssi != 0) { 1950 rssi_samples++; 1951 rssi_total += rssi; 1952 } 1953 } 1954 break; 1955 case IEEE80211_M_MONITOR: /* XXX */ 1956 case IEEE80211_M_STA: /* use stats from associated ap */ 1957 default: 1958 if (ic->ic_bss != NULL) 1959 rssi_total = ic->ic_node_getrssi(ic->ic_bss); 1960 rssi_samples = 1; 1961 break; 1962 } 1963 return rssi_total / NZ(rssi_samples); 1964#undef NZ 1965} 1966 1967void 1968ieee80211_getsignal(struct ieee80211com *ic, int8_t *rssi, int8_t *noise) 1969{ 1970 1971 if (ic->ic_bss == NULL) /* NB: shouldn't happen */ 1972 return; 1973 ic->ic_node_getsignal(ic->ic_bss, rssi, noise); 1974 /* for non-station mode return avg'd rssi accounting */ 1975 if (ic->ic_opmode != IEEE80211_M_STA) 1976 *rssi = ieee80211_getrssi(ic); 1977} 1978 1979/* 1980 * Node table support. 1981 */ 1982 1983static void 1984ieee80211_node_table_init(struct ieee80211com *ic, 1985 struct ieee80211_node_table *nt, 1986 const char *name, int inact, int keyixmax) 1987{ 1988 1989 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1990 "%s %s table, inact %u\n", __func__, name, inact); 1991 1992 nt->nt_ic = ic; 1993 /* XXX need unit */ 1994 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_ifp->if_xname); 1995 IEEE80211_SCAN_LOCK_INIT(nt, ic->ic_ifp->if_xname); 1996 TAILQ_INIT(&nt->nt_node); 1997 nt->nt_name = name; 1998 nt->nt_scangen = 1; 1999 nt->nt_inact_init = inact; 2000 nt->nt_keyixmax = keyixmax; 2001 if (nt->nt_keyixmax > 0) { 2002 MALLOC(nt->nt_keyixmap, struct ieee80211_node **, 2003 keyixmax * sizeof(struct ieee80211_node *), 2004 M_80211_NODE, M_NOWAIT | M_ZERO); 2005 if (nt->nt_keyixmap == NULL) 2006 if_printf(ic->ic_ifp, 2007 "Cannot allocate key index map with %u entries\n", 2008 keyixmax); 2009 } else 2010 nt->nt_keyixmap = NULL; 2011} 2012 2013static void 2014ieee80211_node_table_reset(struct ieee80211_node_table *nt) 2015{ 2016 2017 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 2018 "%s %s table\n", __func__, nt->nt_name); 2019 2020 IEEE80211_NODE_LOCK(nt); 2021 ieee80211_free_allnodes_locked(nt); 2022 IEEE80211_NODE_UNLOCK(nt); 2023} 2024 2025static void 2026ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2027{ 2028 2029 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 2030 "%s %s table\n", __func__, nt->nt_name); 2031 2032 IEEE80211_NODE_LOCK(nt); 2033 ieee80211_free_allnodes_locked(nt); 2034 if (nt->nt_keyixmap != NULL) { 2035 /* XXX verify all entries are NULL */ 2036 int i; 2037 for (i = 0; i < nt->nt_keyixmax; i++) 2038 if (nt->nt_keyixmap[i] != NULL) 2039 printf("%s: %s[%u] still active\n", __func__, 2040 nt->nt_name, i); 2041 FREE(nt->nt_keyixmap, M_80211_NODE); 2042 nt->nt_keyixmap = NULL; 2043 } 2044 IEEE80211_SCAN_LOCK_DESTROY(nt); 2045 IEEE80211_NODE_LOCK_DESTROY(nt); 2046} 2047